/* Target common WordPress and Block Theme site title selectors */
.wp-block-site-title,
.wp-block-site-title a,
.site-title,
.site-title a {
    background: linear-gradient(
        to right,
        #1a1a1a,
        #333333,
        #555555,
        #777777,
        #999999,
        #555555,
        #1a1a1a
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent; /* Fallback */
    animation: rainbow_wave_90432abf 12s linear infinite;
    display: inline-block;
}

@keyframes rainbow_wave_90432abf {
    0% {
        background-position: 0% center;
    }
    100% {
        background-position: 200% center;
    }
}